Looking for some brainy Victron experts to help me with a problem installation. (Background: I work for a company that installs alternative power systems and we install 5-6 systems a month, predominantly using Victron Energy equipment)
3 x Quattro 15kVA in an off-grid application using AC & DC-coupled solar on a Pylontech battery bank.
4 x Victron SmartSolar 250/100 Solar Charge Controllers
1 x Fronius Symo 15.0 AC coupled PV inverter
12 x Pylontech US3000 Lithium Batteries
Victron Cerbo GX with Touch Display
Setup: Off-Grid with a generator (80kVA)
PV Inverter Support Assistant installed
I get sporadic occurrences of notification #1 Device Switched Off, where the Phase 1 master inverter simply switches off.
What I have tried:
1. I have updated to firmware version 476 and replaced all VE.BUS cables with Victron supplied cables.
2. I have also tried replacing the phase L1 master inverter with a new Victron Quattro 15kVA Inverter.
3. I have tried to analyse all the available data on VRM, but I cannot see any drop in DC bus voltage, an overload from AC output or excessive generation from the Fronius PV.
When it occurs, all of the LED's on the Phase L1 Master simply go out, and the other two inverters present an LED sequence indicating that they are missing (not detecting) the master.
30s later the Phase L1 master restarts and the 3 inverters begin inverting again. No alarm in the VRM alarm logs. Only a notification on the Victron Cerbo GX indicating #1 device has switched off.
Would really appreciate some help.